Antenna device and radar device using the same
US7271778B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device having a primary radiator that includes a transmission portion formed of a cylindrical waveguide extending in a direction parallel to the frontward direction of the antenna device, and a radiation portion of a rectangular horn shape, extending in a direction perpendicular to the above-described frontward direction. The radiation portion is rotatably connected, by a rotary joint, to a waveguide of which the center axis in the extending direction conforms to that of the transmission portion. A reflector is disposed about the rotation axis of the primary radiator along the rotation axis direction thereof, and has a reflection surface around the entire peripheral direction of the primary radiator. The reflector is disposed at a predetermined attitude with respect to the primary radiator so as to obtain a predetermined directivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.